NI SCXI-1126 Eight-Channel Isolated Frequency Input Module

NI SCXI-1126 Eight-Channel Isolated Frequency Input Module

About the SCXI-1126

The SCXI-1126 signal conditioning module is used in isolating frequency generating sensors, and other analog and digital periodic signal sources. The SCXI-1126 has eight isolated input channels, each with ten selectable input frequency ranges from 250 Hz to 128 kHz, along with programmable input threshold and hysteresis functions. Each channel also has four selectable, 4-pole lowpass filters with cut-off frequencies ranging from 1Hz to 1kHz.

Channel-to-Channel Isolated Analog Input Stage

The input stage of each channel is isolated from the other channels and from the chassis, up to 250 Vrms. Each channel is also protected from input overvoltages, up to 250 Vrms powered on or off.

This stage consists of a trigger circuit that compares the input waveform to a user-programmed threshold and hysteresis. The programmable range of the threshold is –0.5 to 4.48 V, and the programmable range of the hysteresis is 0 to 4.98 V. You can extend these ranges by using an attenuator terminal block. For example, the SCXI-1327 100:1 high-voltage attenuator terminal block extends the threshold range from –50 to 250 V, and the hysteresis range from 0 to 250 V.

Key Features

Eight-Channel Isolation:

The SCXI-1126 offers eight isolated frequency input channels, providing high electrical isolation between channels and the system, which is crucial for protecting both the module and the connected devices from damage due to voltage spikes or ground loops.

Frequency Input Capability:

Each channel can accept frequency inputs, making the module suitable for applications that require the measurement of periodic signals, such as those found in machinery, motors, and other rotating equipment.

High Accuracy and Precision:

The SCXI-1126 is designed to provide high accuracy and precision in frequency measurements, ensuring reliable and consistent results.

Specifications

Channels:

8 isolated frequency input channels.

System Support:

Compatible with PLC/DCS systems.

Power Requirements:

Operates at a voltage of 220V.

Dimensions and Weight:

Dimensions: approximately 26mm x 33mm x 37mm.

Weight: approximately 2.3 kg.

Additional Specifications:

Net depth/length: 135 mm.

Power: 2700 (related to the system environment and usage).

Applications

Industrial Monitoring and Control:

The SCXI-1126 can be used in industrial monitoring and control systems to measure the frequency of signals from sensors and actuators, providing real-time data for monitoring machinery and equipment.

Testing and Measurement:

In testing and measurement applications, the module can be used to measure the frequency of signals generated by devices under test, such as motors, generators, and other rotating machinery.

Automation and Control Systems:

The SCXI-1126 is suitable for use in automation and control systems, where it can be used to monitor and control the operation of various devices based on frequency inputs.

Additional Information

Programming and Configuration:

The SCXI-1126 can be configured and programmed using National Instruments' software tools, such as Measurement & Automation Explorer (MAX) and LabVIEW.

Integration and Expandability:

The module can be integrated with other SCXI modules and systems to create a comprehensive data acquisition solution.

It supports synchronization and triggering capabilities, allowing it to be used in complex test setups.